Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a first image in a sequence for a displayscreen or portion thereof with an animated graphical user interface,showing our new design;

FIG. 2 is a second image thereof;

FIG. 3 is a third image thereof;

FIG. 4 is a fourth image thereof;

FIG. 5 is a fifth image thereof;

FIG. 6 is a sixth image thereof; and,

FIG. 7 is a seventh image thereof.

The dot-dash lines in the figures represent a display screen or portionthereof and a boundary line and form no part of the claimed design. Theremaining broken lines, showing portions of the animated graphical userinterface, form no part of the claimed design.

The appearance of the animated user interface sequentially transitionsbetween the images shown in FIGS. 1-7. The process or period in whichone image transitions to another forms no part of the claimed design.

CLAIM We claim the ornamental design for a display screen or portionthereof with an animated graphical user interface, as shown anddescribed.